Y LANDED ON OCCUPIED RWY OVER X. RWY INCURSION. SYS ERROR.

Narrative

RPTR WAS IN A C-172 HOLDING SHORT OF ACTIVE RWY 33L. THE STUDENT WAS CLRED FOR TKOF. WHILE TAKING THE RWY AND CHKING VISUALLY THE FINAL APCH; ANOTHER C-172 WAS OBSERVED ON SHORT FINAL (LESS THAN 1/8 MI). THE RPTR INSTRUCTED THE STUDENT TO CLR THE RWY STRAIGHT AHEAD ONTO RWY 10. THE AIRBORNE C-172 PASSED OVER THE RPTR'S ACFT AND LANDED APPROX 1000 FT BEYOND. THE RPTR'S ACFT REPOSITIONED TO HOLD SHORT OF THE ACTIVE AND ADVISED THE TWR OF THE AVOIDING ACTION. IT WAS CLRED INTO POS AND WHEN THE LNDG C-172 WAS CLR OF THE RWY; GIVEN TKOF CLRNC. UPON RETURN; RPTR WAS ASKED TO CONTACT TWR AND IT WAS DETERMINED THAT BOTH ACFT WERE CLRED AND THE DUTY CTLR FELT THERE WAS ADEQUATE SEPARATION TO ALLOW THE RPTR'S ACFT TO TKOF. THE DUTY CTLR WAS UNDERGOING TRAINING AND MADE AN UNDERSTANDABLE MISTAKE. IT IS UNCLR WHY THE PLT OF THE LNDG ACFT CONTINUED HIS APCH AND LANDED OVER ANOTHER ACFT RATHER THAN ABORT THE APCH BUT THERE WAS NO INJURY OR DAMAGE AND NO FURTHER ACTION IS BEING TAKEN BY THE RPTR OR ATC.